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Merge branch 'update_net_response'

This commit is contained in:
Daniel Nelson 2018-05-08 16:17:56 -07:00
parent 1d9488bd42 078eb47265
commit 80df42d87b
3 changed files with 197 additions and 94 deletions
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68
plugins/inputs/net_response/README.md
View File

@ -1,11 +1,12 @@
# Network Response Input Plugin
The input plugin test UDP/TCP connections response time.
It can also check response text.
The input plugin test UDP/TCP connections response time and can optional
verify text in the response.
### Configuration:
```
```toml
# Collect response time of a TCP or UDP connection
[[inputs.net_response]]
## Protocol, must be "tcp" or "udp"
## NOTE: because the "udp" protocol does not respond to requests, it requires
@ -13,11 +14,12 @@ It can also check response text.
protocol = "tcp"
## Server address (default localhost)
address = "localhost:80"
## Set timeout
timeout = "1s"
# timeout = "1s"
## Set read timeout (only used if expecting a response)
read_timeout = "1s"
# read_timeout = "1s"
## The following options are required for UDP checks. For TCP, they are
## optional. The plugin will send the given string to the server and then
@ -27,57 +29,29 @@ It can also check response text.
## expected string in answer
# expect = "ssh"
[[inputs.net_response]]
protocol = "tcp"
address = ":80"
# TCP or UDP 'ping' given url and collect response time in seconds
[[inputs.net_response]]
## Protocol, must be "tcp" or "udp"
protocol = "tcp"
## Server address (default localhost)
address = "github.com:80"
## Set timeout
timeout = "1s"
## Optional string sent to the server
send = "ssh"
## Optional expected string in answer
expect = "ssh"
## Set read timeout (only used if expecting a response)
read_timeout = "1s"
[[inputs.net_response]]
protocol = "udp"
address = "localhost:161"
timeout = "2s"
send = "hello server"
expect = "hello client"
## Uncomment to remove deprecated fields; recommended for new deploys
# fieldexclude = ["result_type", "string_found"]
```
### Measurements & Fields:
### Metrics:
- net_response
- response_time (float, seconds)
- result_type (string) # success, timeout, connection_failed, read_failed, string_mismatch
- [**DEPRECATED**] string_found (boolean)
### Tags:
- All measurements have the following tags:
- tags:
- server
- port
- protocol
- result
- fields:
- response_time (float, seconds)
- success (int) # success 0, failure 1
- result_code (int, success = 0, timeout = 1, connection_failed = 2, read_failed = 3, string_mismatch = 4)
- result_type (string) **DEPRECATED in 1.7; use result tag**
- string_found (boolean) **DEPRECATED in 1.4; use result tag**
### Example Output:
```
$ ./telegraf --config telegraf.conf --input-filter net_response --test
net_response,server=influxdata.com,port=8080,protocol=tcp,host=localhost result_type="timeout" 1499310361000000000
net_response,server=influxdata.com,port=443,protocol=tcp,host=localhost result_type="success",response_time=0.088703864 1499310361000000000
net_response,protocol=tcp,host=localhost,server=this.domain.does.not.exist,port=443 result_type="connection_failed" 1499310361000000000
net_response,protocol=udp,host=localhost,server=influxdata.com,port=8080 result_type="read_failed" 1499310362000000000
net_response,port=31338,protocol=udp,host=localhost,server=localhost result_type="string_mismatch",string_found=false,response_time=0.00242682 1499310362000000000
net_response,protocol=udp,host=localhost,server=localhost,port=31338 response_time=0.001128598,result_type="success",string_found=true 1499310362000000000
net_response,server=this.domain.does.not.exist,port=443,protocol=udp,host=localhost result_type="connection_failed" 1499310362000000000
net_response,port=8086,protocol=tcp,result=success,server=localhost response_time=0.000092948,result_code=0i,result_type="success" 1525820185000000000
net_response,port=8080,protocol=tcp,result=connection_failed,server=localhost result_code=2i,result_type="connection_failed" 1525820088000000000
net_response,port=8080,protocol=udp,result=read_failed,server=localhost result_code=3i,result_type="read_failed",string_found=false 1525820088000000000
```

142
plugins/inputs/net_response/net_response.go
View File

@ -13,7 +13,17 @@ import (
"github.com/influxdata/telegraf/plugins/inputs"
)
// NetResponses struct
type ResultType uint64
const (
Success ResultType = 0
Timeout = 1
ConnectionFailed = 2
ReadFailed = 3
StringMismatch = 4
)
// NetResponse struct
type NetResponse struct {
Address string
Timeout internal.Duration
@ -23,8 +33,11 @@ type NetResponse struct {
Protocol string
}
func (_ *NetResponse) Description() string {
return "TCP or UDP 'ping' given url and collect response time in seconds"
var description = "Collect response time of a TCP or UDP connection"
// Description will return a short string to explain what the plugin does.
func (*NetResponse) Description() string {
return description
}
var sampleConfig = `
@ -34,11 +47,12 @@ var sampleConfig = `
protocol = "tcp"
## Server address (default localhost)
address = "localhost:80"
## Set timeout
timeout = "1s"
# timeout = "1s"
## Set read timeout (only used if expecting a response)
read_timeout = "1s"
# read_timeout = "1s"
## The following options are required for UDP checks. For TCP, they are
## optional. The plugin will send the given string to the server and then
@ -47,15 +61,22 @@ var sampleConfig = `
# send = "ssh"
## expected string in answer
# expect = "ssh"
## Uncomment to remove deprecated fields
# fieldexclude = ["result_type", "string_found"]
`
func (_ *NetResponse) SampleConfig() string {
// SampleConfig will return a complete configuration example with details about each field.
func (*NetResponse) SampleConfig() string {
return sampleConfig
}
func (n *NetResponse) TcpGather() (map[string]interface{}, error) {
// Prepare fields
fields := make(map[string]interface{})
// TCPGather will execute if there are TCP tests defined in the configuration.
// It will return a map[string]interface{} for fields and a map[string]string for tags
func (n *NetResponse) TCPGather() (tags map[string]string, fields map[string]interface{}) {
// Prepare returns
tags = make(map[string]string)
fields = make(map[string]interface{})
// Start Timer
start := time.Now()
// Connecting
@ -65,11 +86,11 @@ func (n *NetResponse) TcpGather() (map[string]interface{}, error) {
// Handle error
if err != nil {
if e, ok := err.(net.Error); ok && e.Timeout() {
fields["result_type"] = "timeout"
setResult(Timeout, fields, tags, n.Expect)
} else {
fields["result_type"] = "connection_failed"
setResult(ConnectionFailed, fields, tags, n.Expect)
}
return fields, nil
return tags, fields
}
defer conn.Close()
// Send string if needed
@ -92,30 +113,30 @@ func (n *NetResponse) TcpGather() (map[string]interface{}, error) {
responseTime = time.Since(start).Seconds()
// Handle error
if err != nil {
fields["string_found"] = false
fields["result_type"] = "read_failed"
setResult(ReadFailed, fields, tags, n.Expect)
} else {
// Looking for string in answer
RegEx := regexp.MustCompile(`.*` + n.Expect + `.*`)
find := RegEx.FindString(string(data))
if find != "" {
fields["result_type"] = "success"
fields["string_found"] = true
setResult(Success, fields, tags, n.Expect)
} else {
fields["result_type"] = "string_mismatch"
fields["string_found"] = false
setResult(StringMismatch, fields, tags, n.Expect)
}
}
} else {
fields["result_type"] = "success"
setResult(Success, fields, tags, n.Expect)
}
fields["response_time"] = responseTime
return fields, nil
return tags, fields
}
func (n *NetResponse) UdpGather() (map[string]interface{}, error) {
// Prepare fields
fields := make(map[string]interface{})
// UDPGather will execute if there are UDP tests defined in the configuration.
// It will return a map[string]interface{} for fields and a map[string]string for tags
func (n *NetResponse) UDPGather() (tags map[string]string, fields map[string]interface{}) {
// Prepare returns
tags = make(map[string]string)
fields = make(map[string]interface{})
// Start Timer
start := time.Now()
// Resolving
@ -125,8 +146,8 @@ func (n *NetResponse) UdpGather() (map[string]interface{}, error) {
conn, err := net.DialUDP("udp", LocalAddr, udpAddr)
// Handle error
if err != nil {
fields["result_type"] = "connection_failed"
return fields, nil
setResult(ConnectionFailed, fields, tags, n.Expect)
return tags, fields
}
defer conn.Close()
// Send string
@ -142,24 +163,27 @@ func (n *NetResponse) UdpGather() (map[string]interface{}, error) {
responseTime := time.Since(start).Seconds()
// Handle error
if err != nil {
fields["result_type"] = "read_failed"
return fields, nil
} else {
// Looking for string in answer
RegEx := regexp.MustCompile(`.*` + n.Expect + `.*`)
find := RegEx.FindString(string(buf))
if find != "" {
fields["result_type"] = "success"
fields["string_found"] = true
} else {
fields["result_type"] = "string_mismatch"
fields["string_found"] = false
}
setResult(ReadFailed, fields, tags, n.Expect)
return tags, fields
}
// Looking for string in answer
RegEx := regexp.MustCompile(`.*` + n.Expect + `.*`)
find := RegEx.FindString(string(buf))
if find != "" {
setResult(Success, fields, tags, n.Expect)
} else {
setResult(StringMismatch, fields, tags, n.Expect)
}
fields["response_time"] = responseTime
return fields, nil
return tags, fields
}
// Gather is called by telegraf when the plugin is executed on its interval.
// It will call either UDPGather or TCPGather based on the configuration and
// also fill an Accumulator that is supplied.
func (n *NetResponse) Gather(acc telegraf.Accumulator) error {
// Set default values
if n.Timeout.Duration == 0 {
@ -189,24 +213,56 @@ func (n *NetResponse) Gather(acc telegraf.Accumulator) error {
// Prepare data
tags := map[string]string{"server": host, "port": port}
var fields map[string]interface{}
var returnTags map[string]string
// Gather data
if n.Protocol == "tcp" {
fields, err = n.TcpGather()
returnTags, fields = n.TCPGather()
tags["protocol"] = "tcp"
} else if n.Protocol == "udp" {
fields, err = n.UdpGather()
returnTags, fields = n.UDPGather()
tags["protocol"] = "udp"
} else {
return errors.New("Bad protocol")
}
if err != nil {
return err
for key, value := range returnTags {
tags[key] = value
}
// Merge the tags
for k, v := range returnTags {
tags[k] = v
}
// Add metrics
acc.AddFields("net_response", fields, tags)
return nil
}
func setResult(result ResultType, fields map[string]interface{}, tags map[string]string, expect string) {
var tag string
switch result {
case Success:
tag = "success"
case Timeout:
tag = "timeout"
case ConnectionFailed:
tag = "connection_failed"
case ReadFailed:
tag = "read_failed"
case StringMismatch:
tag = "string_mismatch"
}
tags["result"] = tag
fields["result_code"] = uint64(result)
// deprecated in 1.7; use result tag
fields["result_type"] = tag
// deprecated in 1.4; use result tag
if expect != "" {
fields["string_found"] = result == Success
}
}
func init() {
inputs.Add("net_response", func() telegraf.Input {
return &NetResponse{}

81
plugins/inputs/net_response/net_response_test.go
View File

@ -13,6 +13,21 @@ import (
"github.com/stretchr/testify/require"
)
func TestSample(t *testing.T) {
c := &NetResponse{}
output := c.SampleConfig()
if output != sampleConfig {
t.Error("Sample config doesn't match")
}
}
func TestDescription(t *testing.T) {
c := &NetResponse{}
output := c.Description()
if output != description {
t.Error("Description output is not correct")
}
}
func TestBadProtocol(t *testing.T) {
var acc testutil.Accumulator
// Init plugin
@ -26,6 +41,50 @@ func TestBadProtocol(t *testing.T) {
assert.Equal(t, "Bad protocol", err1.Error())
}
func TestNoPort(t *testing.T) {
var acc testutil.Accumulator
c := NetResponse{
Protocol: "tcp",
Address: ":",
}
err1 := c.Gather(&acc)
require.Error(t, err1)
assert.Equal(t, "Bad port", err1.Error())
}
func TestAddressOnly(t *testing.T) {
var acc testutil.Accumulator
c := NetResponse{
Protocol: "tcp",
Address: "127.0.0.1",
}
err1 := c.Gather(&acc)
require.Error(t, err1)
assert.Equal(t, "address 127.0.0.1: missing port in address", err1.Error())
}
func TestSendExpectStrings(t *testing.T) {
var acc testutil.Accumulator
tc := NetResponse{
Protocol: "udp",
Address: "127.0.0.1:7",
Send: "",
Expect: "toast",
}
uc := NetResponse{
Protocol: "udp",
Address: "127.0.0.1:7",
Send: "toast",
Expect: "",
}
err1 := tc.Gather(&acc)
require.Error(t, err1)
assert.Equal(t, "Send string cannot be empty", err1.Error())
err2 := uc.Gather(&acc)
require.Error(t, err2)
assert.Equal(t, "Expected string cannot be empty", err2.Error())
}
func TestTCPError(t *testing.T) {
var acc testutil.Accumulator
// Init plugin
@ -39,12 +98,14 @@ func TestTCPError(t *testing.T) {
acc.AssertContainsTaggedFields(t,
"net_response",
map[string]interface{}{
"result_code": uint64(2),
"result_type": "connection_failed",
},
map[string]string{
"server": "",
"port": "9999",
"protocol": "tcp",
"result": "connection_failed",
},
)
}
@ -77,11 +138,14 @@ func TestTCPOK1(t *testing.T) {
acc.AssertContainsTaggedFields(t,
"net_response",
map[string]interface{}{
"result_code": uint64(0),
"result_type": "success",
"string_found": true,
"response_time": 1.0,
},
map[string]string{"server": "127.0.0.1",
map[string]string{
"result": "success",
"server": "127.0.0.1",
"port": "2004",
"protocol": "tcp",
},
@ -118,11 +182,14 @@ func TestTCPOK2(t *testing.T) {
acc.AssertContainsTaggedFields(t,
"net_response",
map[string]interface{}{
"result_code": uint64(4),
"result_type": "string_mismatch",
"string_found": false,
"response_time": 1.0,
},
map[string]string{"server": "127.0.0.1",
map[string]string{
"result": "string_mismatch",
"server": "127.0.0.1",
"port": "2004",
"protocol": "tcp",
},
@ -131,7 +198,7 @@ func TestTCPOK2(t *testing.T) {
wg.Wait()
}
func TestUDPrror(t *testing.T) {
func TestUDPError(t *testing.T) {
var acc testutil.Accumulator
// Init plugin
c := NetResponse{
@ -151,10 +218,13 @@ func TestUDPrror(t *testing.T) {
acc.AssertContainsTaggedFields(t,
"net_response",
map[string]interface{}{
"result_code": uint64(3),
"result_type": "read_failed",
"response_time": 1.0,
"string_found": false,
},
map[string]string{
"result": "read_failed",
"server": "",
"port": "9999",
"protocol": "udp",
@ -190,11 +260,14 @@ func TestUDPOK1(t *testing.T) {
acc.AssertContainsTaggedFields(t,
"net_response",
map[string]interface{}{
"result_code": uint64(0),
"result_type": "success",
"string_found": true,
"response_time": 1.0,
},
map[string]string{"server": "127.0.0.1",
map[string]string{
"result": "success",
"server": "127.0.0.1",
"port": "2004",
"protocol": "udp",
},